<template>
  <div class="role">
    <el-card style="width:98%;margin:30px auto;">
      <div clas="title" style="font-weight:bold;font-size:17px">角色管理</div>

      <div style="display: flex;justify-content: space-between">

        <div style="margin: 20px 2px">
          <el-button type="primary" icon="el-icon-plus" circle @click="handleAdd" title="添加"></el-button>
          <el-button type="danger" @click="delBatch" icon="el-icon-delete" title="批量删除" slot="reference"
                     style="margin-left: 10px"></el-button>
        </div>
        <div style="margin: 20px 5px">
          <el-input style="width: 200px" placeholder="请输入名称" suffix-icon="el-icon-search" v-model="name"></el-input>
          <el-button class="ml-5" type="primary" @click="load" style="margin-left: 10px">搜索</el-button>
          <el-button type="warning" @click="reset">重置</el-button>
        </div>


      </div>
      <el-table :data="tableData" border stripe :header-cell-class-name="'headerBg'"
                @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="55"></el-table-column>
        <!--<el-table-column prop="id" label="ID" width="80"></el-table-column>-->
        <el-table-column prop="name" label="名称"></el-table-column>
        <el-table-column prop="flag" label="唯一标识"></el-table-column>
        <el-table-column prop="description" label="描述"></el-table-column>
        <el-table-column label="操作" width="280" align="center">
          <template slot-scope="scope">
            <el-button type="info" @click="selectMenu(scope.row)" icon="el-icon-menu" circle title="分配菜单"></el-button>
            <el-button type="primary" @click="handleEdit(scope.row)" icon="el-icon-edit" circle></el-button>
            <el-button @click="del(scope.row.id)" title="删除"
                       slot="reference" type="danger" icon="el-icon-delete" circle
                       style="margin-left: 10px"></el-button>
          </template>
        </el-table-column>
      </el-table>
      <div style="padding: 10px 0">
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[2, 5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
        </el-pagination>
      </div>
    </el-card>
    <el-dialog title="角色信息" :visible.sync="dialogFormVisible"  :destroy-on-close="true">
      <el-form label-width="80px" size="small"
               :rules="rules" ref="form" :model="form">
        <el-form-item label="名称" prop="name">
          <el-input v-model="form.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="唯一标识" prop="flag">
          <el-input v-model="form.flag" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="描述" prop="description">
          <el-input v-model="form.description" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="resetForm('form')">取 消</el-button>
        <el-button type="primary" @click="save">确 定</el-button>
      </div>
    </el-dialog>

    <el-dialog title="菜单分配" :visible.sync="menuDialogVis" >
      <el-tree
        :expand-on-click-node="true"
        :props="props"
        :data="menuData"
        show-checkbox
        node-key="id"
        ref="tree"
        :default-expanded-keys="expends"
        :default-checked-keys="checks">
         <span class="custom-tree-node" slot-scope="{ node, data }">
            <span><i :class="data.icon"></i> {{ data.name }}</span>
         </span>
      </el-tree>
      <div slot="footer" class="dialog-footer">
        <el-button @click="menuDialogVis = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleMenu">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Role",
  data() {
    return {
      tableData: [],
      total: 0,
      pageNum: 1,
      pageSize: 10,
      name: "",
      form: {},
      dialogFormVisible: false,
      menuDialogVis: false,
      multipleSelection: [],
      menuData: [],
      props: {
        label: 'name',
      },
      expends: [],
      checks: [],
      roleId: 0,
      roleFlag: '',
      ids: [],
      rules: {
        name: [
          {required: true, message: '请输入角色类型', trigger: 'blur'},
          {min: 2, max: 10, message: '长度在 2 到 15 个字符', trigger: 'blur'}
        ],
        flag: [
          {required: true, message: '请输入唯一标识', trigger: 'blur'},
          {min: 2, max: 15, message: '长度在 2 到 15 个字符', trigger: 'blur'}
        ],
        description: [
          {required: true, message: '请输入描述', trigger: 'blur'},
          {min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur'}
        ],
      },
    }
  },
  created() {
    this.load()
  },
  methods: {
    load() {
      this.request.get("/role/page", {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          name: this.name,
        }
      }).then(res => {
        this.tableData = res.data.records
        this.total = res.data.total
      })

      this.request.get("/menu/ids").then(r => {
        this.ids = r.data
      })

    },

//消除校验
    resetForm() {
      this.$nextTick(() => {
        this.$refs.form.resetFields();
      })

      this.dialogFormVisible = false

    },


    save() {

      this.$refs['form'].validate((valid) => {
        if (valid) {  // 表单校验合法
          this.request.post("/role", this.form).then(res => {
            if (res.code === 200) {
              this.$message.success("保存成功")
              this.dialogFormVisible = false
              this.load()
            } else {
              this.$message.error("保存失败")
            }
          })
        }
      })


    },
    saveRoleMenu() {
      this.request.post("/role/roleMenu/" + this.roleId, this.$refs.tree.getCheckedKeys()).then(res => {
        if (res.code === 200) {
          this.$message.success("绑定成功")
          this.menuDialogVis = false

          // 操作管理员角色后需要重新登录
          if (this.roleFlag === 'ROLE_ADMIN') {
            this.$store.dispatch('user/logout')
          }
        } else {
          this.$message.error(res.msg)
        }
      })
    },
    handleAdd() {
      this.dialogFormVisible = true
      this.form = {}
    },
    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row))
      this.dialogFormVisible = true
    },
    del(id) {
      this.$confirm('你确定要删除,是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        customClass: 'msgbox',
        type: 'warning'
      }).then(async () => {
        this.request.delete("/role/" + id).then(res => {
          if (res.code === 200) {
            this.$message.success("删除成功")
            this.load()
          } else {
            this.$message.error("删除失败")
          }
        })
      }).catch(() => {
        this.$message({
          message: '已取消删除',
          type: 'success'
        })
      })
    },
    handleSelectionChange(val) {
      this.multipleSelection = val
    },
    //批量删除
    delBatch() {
      this.$confirm('你确定要批量删除,是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        customClass: 'msgbox',
        type: 'warning'
      }).then(async () => {
        let ids = this.multipleSelection.map(v => v.id)  // [{}, {}, {}] => [1,2,3]
        this.request.post("/role/del/batch", ids).then(res => {

          if (ids.length === 0) {
            this.$message({
              type: 'warning',
              message: '请选择数据!'
            });
            return
          }
          if (res.code === 200) {
            this.$message.success("批量删除成功")
            this.load()
          } else {
            this.$message.error("批量删除失败")
          }
        })
      }).catch(() => {
        this.$message({
          message: '已取消删除',
          type: 'success'
        })
      })
    },
    reset() {
      this.name = ""
      this.load()
    },
    handleSizeChange(pageSize) {
      this.pageSize = pageSize
      this.load()
    },
    handleCurrentChange(pageNum) {
      this.pageNum = pageNum
      this.load()
    },
    async selectMenu(role) {
      this.roleId = role.id
      this.roleFlag = role.flag

      // 请求菜单数据
      this.request.get("/menu").then(res => {
        this.menuData = res.data
        // 把后台返回的菜单数据处理成 id数组
        this.expends = this.menuData.map(v => v.id)
      })
      this.request.get("/role/roleMenu/" + this.roleId).then(res => {
        this.checks = res.data
        this.ids.forEach(id => {
          if (!this.checks.includes(id)) {
            // 可能会报错：Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'setChecked')
            this.$nextTick(() => {
              this.$refs.tree.setChecked(id, false)
            })
          }
        })
        this.menuDialogVis = true
      })
    },
  }
}
</script>


<style lang="scss" scope>


.role {

  .headerBg {
    background: #eee !important;
  }

  .el-dialog {
    width: 30%;
  }


  @media screen and (max-width: 440px) {
    .el-dialog {
      width: 90%;
    }

    @media only screen and (min-width:600px) and (max-width:1200px){
      .el-dialog {
        width: 60%;
      }
    }

    @media only screen and (min-width:441px) and (max-width:599px) {
      .el-dialog {
        width: 80%;
      }
    }
  }
}
</style>
<style >

@media (max-width: 720px) {
  .msgbox{
    width: 327px !important;
  }
}

</style>
